Split stator outer ring structure

Abstract

The present invention relates to a split stator outer ring structure, including a yoke of a ring formed by an even number of yoke segments and a stator tooth block formed by stacking punching sheets to form a block, wherein a plurality of tooth block mounting grooves are provided on the inner side surface of the yoke, and one end of the stator tooth block is pressed into the tooth block mounting groove by external force to achieve a tight fit at the connection. The motor outer stator of the present invention is divided into a yoke and a tooth block, and the yoke is further divided into an even number of yoke segments, which fully improves the utilization rate of the punching sheets and has a high material utilization rate; a tooth block mounting groove is provided on the inner side surface of the yoke, and one end of the stator tooth block is pressed into the tooth block mounting groove by external force, and the stator tooth block located in the yoke split part connects the two yoke segments together, and the two yoke segments also hold one end of the stator tooth block tightly in the tooth block mounting groove at the same time, forming a self-locking structure; no welding process is required, the processing and installation methods are simplified, and the overall stability of the motor outer stator can be ensured, and the motor has high performance and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a split stator outer ring structure. Background Art

[0002] Whether the stator teeth and yoke are integral or separated, the structure of the yoke ring is generally blanked or welded. The integral structure is one-time stamping, the structure is reliable, the roundness and concentricity are excellent, and the production efficiency is high. The straight strip and circle structure saves materials and has high stator winding production efficiency. Therefore, the structural design of teeth and yokes, and yokes and yokes is one of the important topics in the design of motor punching.

[0003] The integral blanking stator ring has low material utilization rate during the stamping process, and the utilization rate can usually only reach 50%. The straight strip coil stator ring requires a large investment in stator production, and the roundness and concentricity after coiling are poor, which has an adverse effect on the motor noise. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a split stator outer ring structure.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a split stator outer ring structure, comprising:

[0006] The yoke is a ring formed by an even number of yoke segments;

[0007] The stator tooth block is a block-shaped part formed by stacking punching sheets;

[0008] Among them, a plurality of tooth block installation grooves are opened on the inner side surface of the yoke, and one end of the stator tooth block is pressed into the tooth block installation groove by external force to achieve a tight fit at the connection.

[0009] The stator is divided into a yoke and a tooth block, and the yoke is then divided into an even number of yoke segments to fully improve the utilization rate of the punching sheets; a tooth block mounting groove is opened on the inner side of the yoke, and one end of the stator tooth block is pressed into the tooth block mounting groove by external force. The stator tooth block located in the yoke segment connects the two yoke segments together, and the two yoke segments also hold one end of the stator tooth block tightly in the tooth block mounting groove to form a self-locking structure.

[0010] It is further defined that the cross section of the inner side surface of the yoke is a regular even-numbered polygon, a tooth block mounting groove is provided in the middle of each side, and the split portion of the yoke is located on the center line of the tooth block mounting groove.

[0011] It is further defined that the stator tooth block is composed of a dovetail-shaped inner portion, a cylindrical middle portion and an insert block on the outer portion, the inner portion has an inwardly concave arc surface, and the insert block matches the tooth block mounting groove.

[0012] It is further defined that a step is provided between the columnar middle portion and the insert block, the insert block comprises a straight segment and convex column segments extending outwardly from both ends of the straight segment, and the width of the straight segment is smaller than the width of the columnar middle portion.

[0013] The insert block is arranged in this way, so that it can be closely connected with the tooth block mounting groove, and no gap exists, which can improve the quality of the outer stator of the motor.

[0014] It is further defined that there is a gap between the inner arc surfaces of adjacent stator tooth segments, and the distance of the gap is 5 mm.

[0015] Since the existing stator tooth block and yoke are an integrated structure, the inner side parts of adjacent stator tooth blocks are connected. In order to prevent short circuit, the connected parts need to be disconnected, which is troublesome. In order to facilitate winding, the disconnected parts of the current integrated motor are generally 10mm. The outer stator of the motor of the present invention can be wound from the outside, so the gap can be 5mm. This gap distance can ensure that the stator has a magnetic field density and prevent breakdown.

[0016] It is further defined that the cross-section of the inner side surface of the yoke is circular, the tooth block mounting groove includes a first mounting groove and a second mounting groove, the first mounting groove is arranged in the middle section of the inner side surface of the yoke split body, and the split portion of the yoke is located on the center line of the second mounting groove.

[0017] It is further defined that the stator tooth block includes a first tooth block with one end located in the first installation groove and a second tooth block with one end located in the second installation groove, the first tooth block includes a straight tooth block and an S-shaped tooth block, and the straight tooth block and the S-shaped tooth block are spaced and distributed in the middle section of the inner side surface of the yoke split body;

[0018] The second tooth block is composed of a dovetail inner portion, a columnar middle portion and an insert block on the outer portion, the inner portion facing inward is a concave arc surface, and the insert block matches the second mounting groove; a step is provided between the columnar middle portion and the insert block, and the insert block includes a straight bar segment and convex column segments extending outward from both ends of the straight bar segment, and the width of the straight bar segment is smaller than the width of the columnar middle portion;

[0019] The straight strip tooth block is composed of a dovetail inner portion, a columnar middle portion and an insert block on the outer portion. The inner portion is concavely arc-shaped. The insert block matches the first mounting groove. A step is provided between the columnar middle portion and the insert block.

[0020] The S-shaped tooth block is composed of a dovetail-shaped inner part, an S-shaped middle part and an insert block on the outer part. The inner surface of the inner part facing inward is a concave arc surface. The insert block cooperates with the first mounting groove. A step is provided between the S-shaped middle part and the insert block.

[0021] It is further defined that there is a gap between the inner arc surfaces of adjacent stator tooth segments, and the distance of the gap is 5 mm.

[0022] It is further defined that the area between adjacent stator tooth segments mounted on the yoke forms a stator slot.

[0023] It is further defined that the yoke is divided into 4 sections, 5 sections or 6 sections.

[0024] According to the number of magnetic poles of existing commonly used small and medium-sized motors, the number of sections of the yoke is set to 4, 5 or 6.

[0025] The beneficial effects of the present invention are as follows: the outer stator of the motor of the present invention is divided into a yoke and a tooth block, and the yoke is further divided into an even number of yoke segments, which fully improves the utilization rate of the punching sheets, simplifies the stamping die of the material, optimizes the pattern arrangement, has low investment, and has high material utilization rate; a tooth block installation groove is opened on the inner side surface of the yoke, and one end of the stator tooth block is pressed into the tooth block installation groove by external force, and the stator tooth block located in the yoke segment connects the two yoke segments together, and the two yoke segments also hold one end of the stator tooth block well in the tooth block installation groove to form a self-locking structure; no welding process is required, the processing and installation methods are simplified, and the overall stability of the outer stator of the motor can be guaranteed, which also makes the motor have high performance and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is a structural schematic diagram of implementation one of the present invention.

[0028] Figure 2 It is a schematic structural diagram of the yoke split body in the first embodiment of the present invention.

[0029] Figure 3 It is a schematic diagram of the structure of the stator tooth block in the first embodiment of the present invention.

[0030] Figure 4 It is a structural schematic diagram of implementation 2 of the present invention.

[0031] Figure 5 It is a schematic diagram of the structure of the yoke split body in the second embodiment of the present invention.

[0032] Figure 6 It is a structural schematic diagram of the second tooth block in the second embodiment of the present invention.

[0033] Figure 7 It is a schematic structural diagram of a straight strip tooth block in embodiment 2 of the present invention.

[0034] Figure 8 It is a schematic diagram of the S-shaped gear block structure in the second embodiment of the present invention.

[0035] In the figure: 1. yoke, 10. yoke split, 2. stator tooth block, 11. tooth block mounting groove, 3. stator slot, 21. inner side, 22. cylindrical middle part, 23. plug block, 24. step, 25. S-shaped middle part, 231. straight bar section, 232. convex column section, 11a. first mounting groove, 11b. second mounting groove, 2a. first tooth block, 2b. second tooth block, 2a′. straight bar tooth block, 2a〞. S-shaped tooth block. DETAILED DESCRIPTION

[0036] The present invention will now be further described in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0037] like Figure 1 As shown, a split stator outer ring structure includes a yoke 1 formed by four segments of yoke segments 10 to form a ring and a stator tooth block 2 formed by stacking punching sheets to form a block. The yoke segments 10 are also formed by stacking punching sheets.

[0038] There are several tooth block installation grooves 11 on the inner side of the yoke 1, and one end of the stator tooth block 2 is pressed into the tooth block installation groove 11 by external force. The area between adjacent stator tooth blocks 2 installed on the yoke 1 forms a stator slot 3. There is a gap A between the inner arc surfaces of adjacent stator tooth blocks 2. The distance of the gap A is 5mm.

[0039] like Figure 2 As shown, the cross section of the inner side of the yoke 1 is a regular even polygon, a tooth block mounting groove 11 is provided in the middle of each side, and the split part of the yoke 1 is located on the center line of the tooth block mounting groove 11. In this way, less waste can be made and more materials can be saved.

[0040] like Figure 3 As shown, the stator tooth block 2 is composed of a dovetail inner portion 21, a cylindrical middle portion 22 and an insert block 23 at the outer portion. The inner portion 21 has a concave arc-shaped surface facing inward, and the insert block 23 matches the tooth block mounting groove 11. A step 24 is provided between the cylindrical middle portion 22 and the insert block 23. The insert block 23 includes a straight bar segment 232 and a convex column segment 232 extending outward from both ends of the straight bar segment 231. The width of the straight bar segment 231 is smaller than the width of the cylindrical middle portion 22. There is less waste between two adjacent stator tooth blocks 2.

[0041] In addition, according to the number of magnetic poles of existing commonly used small and medium-sized motors, the number of sections of the yoke split 10 is set to 4, 5 or 6. For example, the yoke split 10 of the motor outer stator of a 4-pole motor and an 8-pole motor can be set to 4 sections, the yoke split 10 of the motor outer stator of a 6-pole motor is set to 6 sections, and the yoke split 10 of the motor outer stator of a 10-pole motor is set to 5 sections.

[0042] The present embodiment is applicable to a DC motor, which comprises a rotor and the motor outer stator in the above embodiment, wherein the motor outer stator comprises a yoke 1 formed by a ring formed by four sections of yoke parts 10 and a stator tooth block 2 formed by stacking punching sheets, wherein the yoke parts 10 are also formed by stacking punching sheets, and one end of the stator tooth block 2 is pressed into a tooth block mounting groove 11 on the inner wall of the yoke 1 by an external force, and the stator tooth block 2 located in the split part of the yoke 1 connects the two yoke parts 10 together, and the two yoke parts 10 also hold one end of the stator tooth block 2 well in the tooth block mounting groove 11, thereby ensuring the overall stability of the motor outer stator and making the motor have high performance and low cost.

[0043] Embodiment 2

[0044] like Figure 4 and Figure 5 As shown, the difference from the first embodiment is that the cross section of the inner side of the yoke 2 is circular, the tooth block mounting groove 11 includes a first mounting groove 11a and a second mounting groove 11b, the first mounting groove 11a is arranged in the middle section of the inner side of the yoke split 10, and the split part of the yoke 2 is located on the center line of the second mounting groove 11b. The stator tooth block 2 includes a first tooth block 2a with one end located in the first mounting groove 11a and a second tooth block 2b with one end located in the second mounting groove 11b, the first tooth block 2a includes a straight tooth block 2a′ and an S-shaped tooth block 2a″, and the straight tooth block 2a′ and the S-shaped tooth block 2a″ are spaced apart and distributed in the middle section of the inner side of the yoke split 10.

[0045] like Figure 6 As shown, the second tooth block 2b is composed of a dovetail inner portion 21, a cylindrical middle portion 22 and an insert block 23 on the outer portion. The inner surface of the inner portion 21 facing inward is a concave arc surface, and the insert block 23 cooperates with the second mounting groove 11b; a step 24 is provided between the cylindrical middle portion 22 and the insert block 23, and the insert block 23 includes a straight segment 231 and convex column segments 232 extending outward from both ends of the straight segment 231, and the width of the straight segment 231 is smaller than the width of the cylindrical middle portion 22.

[0046] like Figure 7 As shown, the straight tooth block 2a′ is composed of a dovetail-shaped inner portion 21, a cylindrical middle portion 22 and an insert block 23 on the outer portion. The inner surface of the inner portion 21 facing inward is a concave arc surface, and the insert block 23 matches the first mounting groove 11a; a step 24 is provided between the cylindrical middle portion 22 and the insert block 23, and the cross-section of the insert block 23 is trapezoidal, matching the first mounting groove 11a.

[0047] like Figure 8As shown, the S-shaped tooth block 2a" is composed of a dovetail inner portion 21, an S-shaped middle portion 25 and an insert block 23 on the outer portion. The inner portion 21 has a concave arc-shaped surface facing inward, and the insert block 23 matches the first mounting groove 11a. A step 24 is provided between the S-shaped middle portion 25 and the insert block 23. The cross section of the insert block 23 is trapezoidal and matches the first mounting groove 11a.

[0048] The present embodiment is applicable to an AC motor, which comprises a rotor and the motor outer stator in the above embodiment, wherein the motor outer stator comprises a yoke 1 formed by a ring formed by four yoke segments 10 and a stator tooth block 2 formed by stacking punching sheets, wherein the yoke segments 10 are also formed by stacking punching sheets, and one end of the stator tooth block 2 is pressed into a tooth block mounting groove 11 on the inner wall of the yoke 1 by an external force, and the stator tooth block 2 located in the split part of the yoke 1 connects the two yoke segments 10 together, and the two yoke segments 10 also hold one end of the stator tooth block 2 well in the tooth block mounting groove 11 at the same time, thereby ensuring the overall stability of the motor outer stator and making the motor have high performance and low cost.

[0049] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A split stator outer ring structure, characterized in that: include: The yoke is a ring formed by an even number of yoke segments; the yoke segments are formed by stacking punching sheets; The stator tooth block is a block-shaped part formed by stacking punching sheets; Wherein, a plurality of tooth block installation grooves are provided on the inner side surface of the yoke, and one end of the stator tooth block is pressed into the tooth block installation groove by external force to achieve a tight fit at the connection; The cross section of the inner side of the yoke is a regular even-numbered polygon, a tooth block mounting groove is provided in the middle of each side, and the split part of the yoke is located on the center line of the tooth block mounting groove; The stator tooth block is composed of a dovetail-shaped inner part, a cylindrical middle part and an insert block on the outer part. The inner surface of the inner part facing inward is a concave arc surface, and the insert block matches the tooth block mounting groove. A step is provided between the columnar middle portion and the insert block. The insert block comprises a straight segment and convex column segments extending outwardly from both ends of the straight segment. The width of the straight segment is smaller than the width of the columnar middle portion.

2. The split stator outer ring structure according to claim 1 is characterized in that: There is a gap between the inner arc surfaces of adjacent stator tooth blocks, and the distance of the gap is 5 mm.

3. The split stator outer ring structure according to claim 1 is characterized in that: The cross-section of the inner side surface of the yoke is circular, and the tooth block mounting groove includes a first mounting groove and a second mounting groove, the first mounting groove is arranged in the middle section of the inner side surface of the split yoke, and the split portion of the yoke is located on the center line of the second mounting groove.

4. The split stator outer ring structure according to claim 3 is characterized in that: The stator tooth block includes a first tooth block with one end located in the first installation groove and a second tooth block with one end located in the second installation groove, the first tooth block includes a straight tooth block and an S-shaped tooth block, and the straight tooth block and the S-shaped tooth block are spaced and distributed in the middle section of the inner side surface of the yoke split body; The second tooth block is composed of a dovetail inner portion, a columnar middle portion and an insert block on the outer portion, the inner portion facing inward is a concave arc surface, and the insert block matches the second mounting groove; a step is provided between the columnar middle portion and the insert block, and the insert block includes a straight bar segment and convex column segments extending outward from both ends of the straight bar segment, and the width of the straight bar segment is smaller than the width of the columnar middle portion; The straight strip tooth block is composed of a dovetail inner portion, a columnar middle portion and an insert block on the outer portion. The inner portion is concavely arc-shaped. The insert block matches the first mounting groove. A step is provided between the columnar middle portion and the insert block. The S-shaped tooth block is composed of a dovetail-shaped inner part, an S-shaped middle part and an insert block on the outer part. The inner surface of the inner part facing inward is a concave arc surface. The insert block cooperates with the first mounting groove. A step is provided between the S-shaped middle part and the insert block.

5. The split stator outer ring structure according to claim 4 is characterized in that: There is a gap between the inner arc surfaces of adjacent stator tooth blocks, and the distance of the gap is 5 mm.

6. The split stator outer ring structure according to claim 1, characterized in that: The areas between adjacent stator tooth segments mounted on the yoke form stator slots.

7. The split stator outer ring structure according to claim 1, characterized in that: The yoke is divided into 4 sections or 6 sections.

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